Went back yesterday and it only did it a couple times in the open direction in 30 minutes of running it. Yesterday was a cold day here, and cool in the hoistway.

The previous visit it exhibited the problem at both floors, open and close, and about 97% of the time - and it was a hot day and hot in the hoistway. Seems like there may be a temperature sensitivity, there..

Belts weren’t slipping, linkage right, brushes show hardly any wear. I’ll keep an eye on it.